libs/ardour/session_time.cc

   1
   2 /*
   3   Copyright (C) 1999-2002 Paul Davis
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9
  10   This program is distributed in the hope that it will be useful,
  11   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13   GNU General Public License for more details.
  14
  15   You should have received a copy of the GNU General Public License
  16   along with this program; if not, write to the Free Software
  17   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #ifdef WAF_BUILD
  22 #include "libardour-config.h"
  23 #endif
  24
  25 #include <iostream>
  26 #include <cmath>
  27 #include <unistd.h>
  28
  29 #include "ardour/timestamps.h"
  30
  31 #include "pbd/error.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/stacktrace.h"
  34
  35 #include "ardour/session.h"
  36 #include "ardour/tempo.h"
  37
  38 #include "i18n.h"
  39
  40 using namespace std;
  41 using namespace ARDOUR;
  42 using namespace PBD;
  43
  44 /* BBT TIME*/
  45
  46 void
  47 Session::bbt_time (framepos_t when, Timecode::BBT_Time& bbt)
  48 {
  49         _tempo_map->bbt_time (when, bbt);
  50 }
  51
  52 /* Timecode TIME */
  53
  54 double
  55 Session::timecode_frames_per_second() const
  56 {
  57         return Timecode::timecode_to_frames_per_second (config.get_timecode_format());
  58 }
  59
  60 bool
  61 Session::timecode_drop_frames() const
  62 {
  63         return Timecode::timecode_has_drop_frames(config.get_timecode_format());
  64 }
  65
  66 void
  67 Session::sync_time_vars ()
  68 {
  69         _current_frame_rate = (framecnt_t) round (_base_frame_rate * (1.0 + (config.get_video_pullup()/100.0)));
  70         _frames_per_timecode_frame = (double) _current_frame_rate / (double) timecode_frames_per_second();
  71         if (timecode_drop_frames()) {
  72           _frames_per_hour = (int32_t)(107892 * _frames_per_timecode_frame);
  73         } else {
  74           _frames_per_hour = (int32_t)(3600 * rint(timecode_frames_per_second()) * _frames_per_timecode_frame);
  75         }
  76         _timecode_frames_per_hour = rint(timecode_frames_per_second() * 3600.0);
  77
  78         last_timecode_valid = false;
  79         // timecode type bits are the middle two in the upper nibble
  80         switch ((int) ceil (timecode_frames_per_second())) {
  81         case 24:
  82                 mtc_timecode_bits = 0;
  83                 break;
  84
  85         case 25:
  86                 mtc_timecode_bits = 0x20;
  87                 break;
  88
  89         case 30:
  90         default:
  91                 if (timecode_drop_frames()) {
  92                         mtc_timecode_bits = 0x40;
  93                 } else {
  94                         mtc_timecode_bits =  0x60;
  95                 }
  96                 break;
  97         };
  98         ltc_tx_parse_offset();
  99 }
 100
 101 void
 102 Session::timecode_to_sample( Timecode::Time& timecode, framepos_t& sample, bool use_offset, bool use_subframes ) const
 103 {
 104         timecode.rate = timecode_frames_per_second();
 105
 106         Timecode::timecode_to_sample(
 107                 timecode, sample, use_offset, use_subframes,
 108                 _current_frame_rate,
 109                 config.get_subframes_per_frame(),
 110                 config.get_timecode_offset_negative(), config.get_timecode_offset()
 111                 );
 112
 113 }
 114
 115 void
 116 Session::sample_to_timecode (framepos_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes ) const
 117 {
 118         Timecode::sample_to_timecode (
 119                 sample, timecode, use_offset, use_subframes,
 120
 121                 timecode_frames_per_second(),
 122                 timecode_drop_frames(),
 123                 double(_current_frame_rate),
 124
 125                 config.get_subframes_per_frame(),
 126                 config.get_timecode_offset_negative(), config.get_timecode_offset()
 127                 );
 128 }
 129
 130 void
 131 Session::timecode_time (framepos_t when, Timecode::Time& timecode)
 132 {
 133         if (last_timecode_valid && when == last_timecode_when) {
 134                 timecode = last_timecode;
 135                 return;
 136         }
 137
 138         this->sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
 139
 140         last_timecode_when = when;
 141         last_timecode = timecode;
 142         last_timecode_valid = true;
 143 }
 144
 145 void
 146 Session::timecode_time_subframes (framepos_t when, Timecode::Time& timecode)
 147 {
 148         if (last_timecode_valid && when == last_timecode_when) {
 149                 timecode = last_timecode;
 150                 return;
 151         }
 152
 153         this->sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
 154
 155         last_timecode_when = when;
 156         last_timecode = timecode;
 157         last_timecode_valid = true;
 158 }
 159
 160 void
 161 Session::timecode_duration (framecnt_t when, Timecode::Time& timecode) const
 162 {
 163         this->sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
 164 }
 165
 166 void
 167 Session::timecode_duration_string (char* buf, framepos_t when) const
 168 {
 169         Timecode::Time timecode;
 170
 171         timecode_duration (when, timecode);
 172         snprintf (buf, sizeof (buf), "%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
 173 }
 174
 175 void
 176 Session::timecode_time (Timecode::Time &t)
 177
 178 {
 179         timecode_time (_transport_frame, t);
 180 }
 181
 182 int
 183 Session::jack_sync_callback (jack_transport_state_t state,
 184                              jack_position_t* pos)
 185 {
 186         bool slave = synced_to_jack();
 187
 188         switch (state) {
 189         case JackTransportStopped:
 190                 if (slave && _transport_frame != pos->frame && post_transport_work() == 0) {
 191                         request_locate (pos->frame, false);
 192                         // cerr << "SYNC: stopped, locate to " << pos->frame << " from " << _transport_frame << endl;
 193                         return false;
 194                 } else {
 195                         return true;
 196                 }
 197
 198         case JackTransportStarting:
 199                 // cerr << "SYNC: starting @ " << pos->frame << " a@ " << _transport_frame << " our work = " <<  post_transport_work() << " pos matches ? " << (_transport_frame == pos->frame) << endl;
 200                 if (slave) {
 201                         return _transport_frame == pos->frame && post_transport_work() == 0;
 202                 } else {
 203                         return true;
 204                 }
 205                 break;
 206
 207         case JackTransportRolling:
 208                 // cerr << "SYNC: rolling slave = " << slave << endl;
 209                 if (slave) {
 210                         start_transport ();
 211                 }
 212                 break;
 213
 214         default:
 215                 error << string_compose (_("Unknown JACK transport state %1 in sync callback"), state)
 216                       << endmsg;
 217         }
 218
 219         return true;
 220 }
 221
 222 void
 223 Session::jack_timebase_callback (jack_transport_state_t /*state*/,
 224                                  pframes_t /*nframes*/,
 225                                  jack_position_t* pos,
 226                                  int /*new_position*/)
 227 {
 228         Timecode::BBT_Time bbt;
 229
 230         /* BBT info */
 231
 232         if (_tempo_map) {
 233
 234                 TempoMetric metric (_tempo_map->metric_at (_transport_frame));
 235
 236                 try {
 237                         _tempo_map->bbt_time_rt (_transport_frame, bbt);
 238
 239                         pos->bar = bbt.bars;
 240                         pos->beat = bbt.beats;
 241                         pos->tick = bbt.ticks;
 242
 243                         // XXX still need to set bar_start_tick
 244
 245                         pos->beats_per_bar = metric.meter().divisions_per_bar();
 246                         pos->beat_type = metric.meter().note_divisor();
 247                         pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
 248                         pos->beats_per_minute = metric.tempo().beats_per_minute();
 249
 250                         pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
 251
 252                 } catch (...) {
 253                         /* no message */
 254                 }
 255         }
 256
 257 #ifdef HAVE_JACK_VIDEO_SUPPORT
 258         //poke audio video ratio so Ardour can track Video Sync
 259         pos->audio_frames_per_video_frame = frame_rate() / timecode_frames_per_second();
 260         pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
 261 #endif
 262
 263 #if 0
 264         /* Timecode info */
 265
 266         pos->timecode_offset = config.get_timecode_offset();
 267         t.timecode_frame_rate = timecode_frames_per_second();
 268         pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode;
 269
 270         if (_transport_speed) {
 271
 272                 if (play_loop) {
 273
 274                         Location* location = _locations.auto_loop_location();
 275
 276                         if (location) {
 277
 278                                 t.transport_state = JackTransportLooping;
 279                                 t.loop_start = location->start();
 280                                 t.loop_end = location->end();
 281                                 t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
 282
 283                         } else {
 284
 285                                 t.loop_start = 0;
 286                                 t.loop_end = 0;
 287                                 t.transport_state = JackTransportRolling;
 288
 289                         }
 290
 291                 } else {
 292
 293                         t.loop_start = 0;
 294                         t.loop_end = 0;
 295                         t.transport_state = JackTransportRolling;
 296
 297                 }
 298
 299         }
 300 #endif
 301 }
 302
 303 ARDOUR::framecnt_t
 304 Session::convert_to_frames (AnyTime const & position)
 305 {
 306         double secs;
 307
 308         switch (position.type) {
 309         case AnyTime::BBT:
 310                 return _tempo_map->frame_time (position.bbt);
 311                 break;
 312
 313         case AnyTime::Timecode:
 314                 /* XXX need to handle negative values */
 315                 secs = position.timecode.hours * 60 * 60;
 316                 secs += position.timecode.minutes * 60;
 317                 secs += position.timecode.seconds;
 318                 secs += position.timecode.frames / timecode_frames_per_second();
 319                 if (config.get_timecode_offset_negative()) {
 320                         return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
 321                 } else {
 322                         return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
 323                 }
 324                 break;
 325
 326         case AnyTime::Seconds:
 327                 return (framecnt_t) floor (position.seconds * frame_rate());
 328                 break;
 329
 330         case AnyTime::Frames:
 331                 return position.frames;
 332                 break;
 333         }
 334
 335         return position.frames;
 336 }
 337
 338 ARDOUR::framecnt_t
 339 Session::any_duration_to_frames (framepos_t position, AnyTime const & duration)
 340 {
 341         double secs;
 342
 343         switch (duration.type) {
 344         case AnyTime::BBT:
 345                 return (framecnt_t) ( _tempo_map->framepos_plus_bbt (position, duration.bbt) - position);
 346                 break;
 347
 348         case AnyTime::Timecode:
 349                 /* XXX need to handle negative values */
 350                 secs = duration.timecode.hours * 60 * 60;
 351                 secs += duration.timecode.minutes * 60;
 352                 secs += duration.timecode.seconds;
 353                 secs += duration.timecode.frames / timecode_frames_per_second();
 354                 if (config.get_timecode_offset_negative()) {
 355                         return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
 356                 } else {
 357                         return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
 358                 }
 359                 break;
 360
 361         case AnyTime::Seconds:
 362                 return (framecnt_t) floor (duration.seconds * frame_rate());
 363                 break;
 364
 365         case AnyTime::Frames:
 366                 return duration.frames;
 367                 break;
 368         }
 369
 370         return duration.frames;
 371 }